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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
ahmad-zuhd:1354 – ʿAbdullāh from my father > ʿAffān And Surayj > Mahdī > Surayj > Ghaylān > Muṭarrif

[Machine] He used to say, "Beware of people with bad intentions."  

الزهد لأحمد:١٣٥٤ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنَا أَبِي حَدَّثَنَا عَفَّانُ وَسُرَيْجٌ قَالَا حَدَّثَنَا مَهْدِيٌّ قَالَ سُرَيْجٌ عَنْ غَيْلَانَ عَنْ مُطَرِّفٍ

أَنَّهُ كَانَ يَقُولُ «احْتَرِسُوا مِنَ النَّاسِ بِسُوءِ الظَّنِّ»  

See similar narrations below:

Collected by Suyūṭī